The Model 542 HPLC Autosampler is optimized for use with electrochemical detection and includes an integrated column oven. This compact device offers many features that are usually found in more expensive autosamplers. It has three selectable injection modes: full loop, partial loop fill and microliter shot. The device enables mixing, dilution and online derivatization of samples. The integrated column oven offers temperature control up to 60°C and keeps the connection length between injector and column to a minimum. The fluidic route uses biocompatible (PEEK) components. The quick-change injection valve makes changing easier and minimizes downtime. The standard capacity of the sample container is 84 - 1.8 ml sample vials and 3 - 10 ml vial positions for rinse and change reagents. The sample container can be cooled with the addition of an optional factory-installed temperature control. Specifications:. Sample capacity: Standard container: 84 vials of 1.8 ml and 3 vials of 10 ml. Maximum vial height: 47 mm, Minimum vial height: 32 mm. Loop volume: 1-5000 µL (replaceable). Dispensing syringe: 250 µl or 1000 µl. Bottle detection: Missing bottle is detected by sensor. Headspace pressure: Built-in compressor. Switching time injection valve: Electrical <100 ms. Needle piercing accuracy: ± 0.6 mm. Detergent: External detergent bottle. Biocompatible valve: PEEK injection valve, with quick connection. Fluid-contacting parts in the flow path: SS316, PTFE, TEFZEL, VESPEL, glass, Teflon, PEEK. Integrated column oven: Temperature range: Ambient temperature +5 to 60 °C ± 1 °C. Oven dimensions: 2.5cm width x 2.5cm depth x 30cm length. Communication port: Serial RS232C. Output: Injection marker, 2 auxiliary outputs, alarm output (relay & TTL). Input: Next injection, freeze & stop (TR). Environmental conditions: 10-40°C, 5-95% relative humidity, non-condensing. Device dimensions: 30 cm x 50 cm x 34 cm. Weight: 19 kg, with cooling option 21 kg. Power supply: 115/230VAC; ±15%; 50/60Hz; 200VAC. Product certification: CE. Repeatability: RSD < 0.3% for full loop injections, RSD < 0.5% for partial loop filling, injection volume > 10 µl, RSD < 1.0% for µl recording, injection volume > 10 µl. Cross-contamination: <0.05% with programmable needle cleaning. Methods: 9 programmable methods with sample priority mode. Injection modes: full loop injection, partial loop filling, µl recording. Injection volume: 1 µl – 5000 µl, in 1 µl increments. Injections per vial: Maximum of 9 injections. Analysis time: Maximum 9 hours, 59 minutes, 59 seconds. Programmable needle washing: Between injections, vials and series. Programmable timed events: 4 x AUX-1 on/off, 4 x AUX-2 on/off, initial oven setpoint, 2 x new oven setpoint. Series: 9 programmable series. Sample container cooling: Integrated, Peltier type. Temperature range/capacity: 4-15°C, no more than 20°C below ambient temperature. Temperature accuracy: ±2°C. This ESA Model 542 HPLC Autosampler is in excellent condition. Labprocure is responsible for this device.